(informal, intransitive) To pay a visit in an impromptu manner.

(idiomatic) Suitable or appropriate; keeping with expectations, norms, ideals, or rules. / (of three or more objects) Positioned in a straight line. / (not comparable) assuming a position in the future.

one behind another; in a queue

(idiomatic) Of problems or difficulties, to work out, resolve, or become understood eventually and naturally. / (idiomatic) Used to say that the truth will be revealed in the future.

(idiomatic) Under very unlikely circumstances; probably never.

(idiomatic) Something whose true value is concealed or unknown and may be lower than expected by the buyer or claimed by the seller, especially something offered for sale.

(figuratively, usually with have or with) Used to indicate that a person is distracted or disconnected from the present situation.

(idiomatic) To initiate contact or a relationship; to gain access, especially to an entry-level job.

If a friend helps you when you are in need, they are a true friend. / If one of your friends is in need of help, help them because they are your friend.

(intransitive) To collapse inwards. / (intransitive, military) Of a soldier, to get into position in a rank. / To come to an end; to terminate; to lapse. / To become operative.